<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>H5新特性</title>

    <style>
        header, nav {
            height: 120px;
            width: 800px;
            background-color: pink;
            border-radius: 15px;
            margin: 15px auto;
        }

        section {
            width: 500px;
            height: 300px;
            background-color: skyblue;
        }
    </style>

</head>
<body>
    
    <img src="H5新特性.png" alt="">

    <header>头部标签</header>
    <nav>导航标签</nav>
    <section>某个区域</section>

</body>
</html>